package Q1;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws InterruptedException {
        Scanner sc = new Scanner(System.in);

        long n = 20240601L;
        long count = 3;
        long sum = 7;
        while (count <= n) {
            sum = sum + 7 + (count - 2) * 7 - ((count - 2) * 2 + 1);
            System.out.println(count + ": " + sum);
            count++;
            Thread.sleep(1000);
        }



        sc.close();
    }
}
